| 词条 | NGC 4450 |
| 释义 |
| name = NGC 4450 | image = N4450s.jpg | image_size = 200px | epoch = J2000 | type = SA(s)ab[1] | ra = {{RA|12|28|29.6}}[1] | dec = {{DEC|+17|05|06}}[1] | dist_ly = ~50 million light-years | z = 1954 ± 4 km/s[1] | appmag_v = 10.9[1] | size_v = 5′.2 × 3′.9[1] | size = ~75,000 ly (diameter) | constellation name = Coma Berenices[2] | notes = | names = UGC 7594,[1] PGC 41024[1] }} NGC 4450 is a spiral galaxy in the constellation Coma Berenices. CharacteristicsNGC 4450 is a member of the Virgo Cluster that, like Messier 90, shows smooth, nearly featureless spiral arms,[3] with few star formation regions[4] and little neutral hydrogen compared to other similar spiral galaxies,[5] something that justifies its classification as an anemic galaxy.[4] Measurements with the help of the Hubble Space Telescope show the center of this galaxy has a supermassive black hole.[6] References1. ^1 2 3 4 5 6 7 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 4450 | url=http://nedwww.ipac.caltech.edu/ | accessdate=2007-04-01}} {{Ngc45}}{{galaxy-stub}}2. ^{{cite book | editor=R. W. Sinnott | title= The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer | date=1988 | publisher=Sky Publishing Corporation and Cambridge University Press | isbn=978-0-933346-51-2}} 3. ^AN ATLAS OF THE UNIVERSE - THE VIRGO CLUSTER 4. ^1 {{cite journal| last1 = Koopmann| first1 = R.| last2 = Kenney| first2 = J. D. P.| date = 2004| title = Hα Morphologies and Environmental Effects in Virgo Cluster Spiral Galaxies| journal = The Astrophysical Journal| volume = 613| issue= 2| pages = 866–885| bibcode = 2004ApJ...613..866K| doi = 10.1086/423191|arxiv = astro-ph/0406243 }} 5. ^{{cite journal |last1=Chung |first1=A. |last2=Van Gorkom |first2=J.H. |last3=Kenney |first3=J.F.P. |last4=Crowl |first4=Hugh |last5=Vollmer |first5=B. |date=2009 |title=VLA Imaging of Virgo Spirals in Atomic Gas (VIVA). I. The Atlas and the H I Properties |journal=The Astronomical Journal |volume=138 |issue=6 |pages=1741–1816 |bibcode=2009AJ....138.1741C |doi=10.1088/0004-6256/138/6/1741}} 6. ^Swirling Gas Disk around Black Hole in Galaxy NGC 4450 6 : Unbarred spiral galaxies|Coma Berenices (constellation)|NGC objects|UGC objects|Principal Galaxies Catalogue objects|Virgo Cluster |
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